Python-сообщество

 $.post('send_files', files).done(делаем что-то).fail(делаем что-то другое)

 var csrftoken = document.getElementsByName('csrfmiddlewaretoken')[0].value
var formData = new FormData($("#send_file_form")[0]);
var formData = new FormData(); 
formData.append("file", $('#file_input')[0].files[0]);
formData.append("csrfmiddlewaretoken", csrftoken);
$.ajax({  
   type: "POST", 
   url: "send_files",  
   data: formData, 
   contentType: false, 
   processData: false, 
});  

 var formData = new FormData($("#scan_files_form")[0]);
var formData = new FormData();
var files = $('#files')[0].files;
for (var i = 0; i < files.length; i++) {
       var file = files[i];
       formData.append('files', file, file.name)
 }
var csrftoken = $('#csrftoken').val();
formData.append("csrfmiddlewaretoken", csrftoken);
var description = $('#description').val();
formData.append("description", description);
$.ajax({
     type: "POST",
     url: "scan_files",
     data: formData,
     contentType: false,
     processData: false,
});

 file_list = request.FILES.getlist('files')

 <form id="scan_files_form" enctype="multipart/form-data" method="post" name="scan_files_form">